Declension table of ?saptasaptaka

Neuter	Singular	Dual	Plural
Nominative	saptasaptakam	saptasaptake	saptasaptakāni
Vocative	saptasaptaka	saptasaptake	saptasaptakāni
Accusative	saptasaptakam	saptasaptake	saptasaptakāni
Instrumental	saptasaptakena	saptasaptakābhyām	saptasaptakaiḥ
Dative	saptasaptakāya	saptasaptakābhyām	saptasaptakebhyaḥ
Ablative	saptasaptakāt	saptasaptakābhyām	saptasaptakebhyaḥ
Genitive	saptasaptakasya	saptasaptakayoḥ	saptasaptakānām
Locative	saptasaptake	saptasaptakayoḥ	saptasaptakeṣu

Compound saptasaptaka -

Adverb -saptasaptakam -saptasaptakāt